Glue pen



FIG. 1 is a front view of a glue pen showing the new design;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 a first top perspective view thereof;

FIG. 7 is a second top perspective view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken lines in the drawings illustrate features that form no part of the claimed design. 

CLAIM The ornamental design for a glue pen, as shown. 